Vehicular Live Load library entries define specialized vehicles for live load analysis. These vehicles can be used for design and load ratings.

Item

Description

Entry Name

Each entry must have a unique name. The name may contain any characters and can be up to 32 characters in length. The name can be changed by selecting this entry in the Library Editor window and selecting Edit > Rename Entry

Usage

Select how this live load is to be used for analysis. Options are:

Use for all actions at all locations
Use only for negative moments between points of contraflexure and interior pier reactions
Use only for negative moments and interior pier reactions

Load Type

Select the type of live load model.

	Description
Truck Only	This loading consists only of a truck
Lane Load Only	This loading consists only of a lane load
Sum of Lane Load and Truck	The response of the lane load and truck are added together
Envelope of Lane Load and Truck	The response of the lane load and truck are enveloped

Lane Load

Input the magnitude of the lane load and the span length for which it will be applied. If any span length, measured as the pier-to-pier distance, exceeds the threshold value, the lane load will be applied. A span length of zero will cause the lane load to always be applied.

Truck Configuration

Describe the truck configuration. Trucks are defined as a series of axle weights and spacing. Use the [Add] and [Delete] buttons to define the axles. Spacing is measured as the distance between axles. A single axle spacing can be optional designated as a variable spacing. For a variable spacing, input the axle spacing as min-max (e.g. 14-30).

Neglect axles that do not contributed to the maximum load effect under consideration

When this box is checked, axles not contributing to the maximum load effect under consideration are neglected. This is typically done with notional loads such as HL-93 and NRL.